Junyo Portable Wireless Doorbell Kit1 Plug-in Door Chime Receiver and 1 White Remote Control Push Button Transmitter,300 Meters/1000 Feet Operating Range,52 Beautiful Chimes and Flashing Led Indicators Housing: Designed By Top Fashion Master To Meet The Market Inside: PCB Board and IC Parts Are Equipped With Strong Material, Keeping Long Lifetime; Adopt Digital Coding.It Is More Stable And Can Avoid Interference Distance: The Wireless Distance Achieve 280-300 m, Better Materials Keep Stable Transmitting Range Practical: Easy Installation, Convenient, Plug and Play;With Double-side Stickers at The Back Of The Remote Button, Also You Can Use Screw To Fix It Stability: Guarantee Quality. Products Adopt Excellent Inner Materials That Keeps Itself From Getting Higher Temperature & Interference